Paper-feeding means for printing presses



Sept. 11, 1928. Q 1,683,718

. W. GEGENHEIMER PAPER FEEDING MEANS FOR PRINTING PRESSES Filed Feb. 25,1927 2 Sheets-Sheet INVENTOR Wmuim Gaosnnsmknk.

- ZAJJM ATTORNEY Sept. 11, 1928. 1,683,718

W. GEGENHEIMER I PAPER FEEDING MEANS FOR PRINTING PRESSES Filed Feb. 25,1927 2 Sheets-Sheet 2 INVENTOR mum GEGENHE'MER BY J a V M ATTORNEYassociated elements;

Patented Sept. 11, 1928.

OEBALD'WIN, NEW YORK.

rhea-manure MEANS roii PRINTING rnnssns.

' "Application filed February 25, 1927. Serial No. 170,821,

The object of the presontinvention is ,.to provide means for feedingpaper in pr1nting or lithographi'ng presses whereby the paper may bestretched in such manner as to prevent formation of wrinkles. It frejquent'ly happens that rolls or sheets of paper absorb moisture alongtheir margins or elsewhere when the paper is rolled or stacked and suchsections of the paper sheet or roll expand and become of greater areathan the dry and relatively contracted sections. It

is the specificob1ect ofthe present invention to provide means for sofeeding sheets of paper as to prevent wrinkling.

Theinvention will be understood by reference to the accompanyingdrawings, in which' Figure 1 is a sectional plan View showing anembodiment of the invention applied to a rinting press of the cylindertype igure 2 is a view in elevation of the same; i

Figure 3 is an enlarged sectional detail view of one set of the paperstretching rolls;

Figure 4 is a detail perspective view of the supporting and operatinglever for the lower stretching roll;

Figure 5 is a sectional front elevation of the improvements applied to acylinder press; a

Figure 6 is a detail front elevation of the cam shaft together with itssupporting and Figure 7 is a perspective View of the operatingcam andcam lever. V i

Referring to Figure 2 of the drawings, 1, 1? indicate printing cylindersof a press and 2 indicates a sheet of paper passing through the press bythe rotation of the said cylinders. Projecting forwardly of the press Iframe member 3 is an arm 4 having a boss 48 apertured to receive a studshaft 5 which is held against endwise movement inwardly by a pin orother means 5 (Figure 5); Mounted on a shaft 5 is a lever 6 which at itsend carries a shaft 7 upon which is mounted a roll 8. The front end ofthe shaft is forked at 6 to embrace a cam shaft 9 supported by arm 4.Lever arm 6 is formed with a boss (Ff in which is mounted a lateralproieeting stud shaft 10. And mounted "torock upon shaft 10 is a rocklever 11 carrying at one end a roll 12 and at its opposite end beingheld in contact with a cam 13Lby means of a spring 1a, one end of thespring being connected to lever 6 and the opposite end to the rock arm11 in such'manner that the roll 12 is moved toward role 8 tension.

By reference to Figure 3 it will benoted that roll 12 is shown asmounted on a shaft under spring set at an angle relatively to the shaftfor roll 8. In other words, shaft 12 is toed out toward the margin ofthe paper as the latter is fed through the press and thus side pull iscreated on the sheet, stretching the paper so that it passes into thepress perfectly flat, it being understood that the stretching devicedescribed above at one side of the press is duplicated at the oppositeside of the press, both side margins of the paper being acted upon. 7

In the operation of the device, the rolls 8 and 12 are rotated throughfriction imposed upon them by the sheet 2 in its passage between theprinting rolls. periodically acts upon the rock lever 6 and lever 11'toseparate the rolls and permit the passage of a new sheet betweenthem andinto position to be engaged by the print .ing rolls. The side pull ofone device on one Cam 13 margin of the paper is duplicated by the spring14'. It will also be understood that one of the rollsmay be eliminatedwhere a support or contact member for thesheet is placed on the oppositeside of the roll which is retained. i

Inasmuch as the fundamental idea of the invention is to provide meansfor autoinati- 'cally stretching the sheet laterally durin its passagebetween the printing rolls, it will be understood that variousmodifications may be made inthe embodiment of the in vention illustratedin the drawings without I one of the rolls being held at an angle toroll being disposed at an angle relatively to the marginal line of thesheet; the marginal line of the sheet, and means 2. In combination witha printing press, for periodically moving the rollin' a direcincludingmeans for feeding a sheet theretion away from the sheet. 5 through, aroll for a side margin of the sheet In testimony whereof, I have signedmy and adapted to engage the latter and to be nameto thisSpecification.rotated by frictional contact therewith, the 7 WILLIAM GEGENHEIMER. i

